Dental appliance



FIG. 1. is a front view of a dental appliance showing my new design thereof;

FIG. 2. is a rear view thereof,

FIG. 3. is a left side view thereof;

FIG. 4. is a right side view thereof;

FIG. 5. is a top plan view thereof;

FIG. 6. is a bottom plan view thereof;

FIG. 7. is a front, top, right perspective view thereof; and,

FIG. 8. is a front, bottom, right perspective view thereof. 

CLAIM The ornamental design for a dental appliance, as shown. 